Stewardess® Fruit Pie
Stewardess® Fruit Pies were a brand of fruit pie which existed in one universe. The universe in question was the kind of world usually depicted in advertisements for such products, such that within it, the "power" of Stewardess® Fruit Pie was the best way to repel evil-doers. (PROSE: Jenny Everywhere and the Lord of Hell) They were apparently a snack genuinely appreciated by a number of incarnations of Jenny Everywhere, and were one of the foodstuffs provided at an outdoors party attended by twenty-or-so Jennies in one universe. (PROSE: Paying It Forward)
Behind the scenes
The Stewardess® Fruit Pies are an open-source stand-in for the Hostess Fruit Pies, a brand which was the subject of many narrative ads in popular comic-books in the 1970s and 1980s.
The same joke was made in the Kaza's Mate, Gwenna series, where they were known as Kooba Fruit Pies.